remove unnecessary constructor argument

Author: Radvendii

src/libexpr-tests/value/print.cc

@@ -111,7 +111,7 @@ TEST_F(ValuePrintingTests, vLambda)
     auto posIdx = state.positions.add(origin, 0);
     auto body = ExprInt(0);
 
-    ExprLambda eLambda(state.mem.exprs.alloc, posIdx, createSymbol("a"), &body);
+    ExprLambda eLambda(posIdx, createSymbol("a"), &body);
 
     Value vLambda;
     vLambda.mkLambda(&env, &eLambda);
@@ -500,7 +500,7 @@ TEST_F(ValuePrintingTests, ansiColorsLambda)
     auto posIdx = state.positions.add(origin, 0);
     auto body = ExprInt(0);
 
-    ExprLambda eLambda(state.mem.exprs.alloc, posIdx, createSymbol("a"), &body);
+    ExprLambda eLambda(posIdx, createSymbol("a"), &body);
 
     Value vLambda;
     vLambda.mkLambda(&env, &eLambda);

src/libexpr/include/nix/expr/nixexpr.hh

@@ -545,7 +545,7 @@ public:
         std::ranges::copy(formals.formals, formalsStart);
     };
 
-    ExprLambda(std::pmr::polymorphic_allocator<char> & alloc, PosIdx pos, Symbol arg, Expr * body)
+    ExprLambda(PosIdx pos, Symbol arg, Expr * body)
         : pos(pos)
         , arg(arg)
         , hasFormals(false)

src/libexpr/parser.y

@@ -179,7 +179,7 @@ expr: expr_function;
 
 expr_function
   : ID ':' expr_function
-    { auto me = new ExprLambda(state->alloc, CUR_POS, state->symbols.create($1), $3);
+    { auto me = new ExprLambda(CUR_POS, state->symbols.create($1), $3);
       $$ = me;
       SET_DOC_POS(me, @1);
     }